Chromebooks in 1st Grade?

Hello,
I'm looking for a little advice... What is the youngest age at which kids can be expected to use Chromebooks? Next week I will be entering a 1st grade class for the first time. The school has Chromebooks and I have a lot of fun tasks that I'd like to try out on the learners. Most of it is pointing and clicking with very little keyboard work, but is it asking for trouble to try this with such young learners?

I taught second. We had access to them but I rarely used them. Why? Be cause scientific research is proving that too much screen time on still developing brains stunts the frontal lobes. This is the part of the brain responsible for social interaction and executive process.

Iím not good at copying links...just Google brain research on too much screen time. Psychology Today has several good articles.

Our first grade team uses them daily. It takes a lot of training to teach them to log in and a few still can't without my help. They are touch screens so that helps. I'm going to check out the links from KeyKid for sure

My kinders use them daily. I am ready to throw them out the window. But we use them. Logging on is the worst and my district does not make it easy. I also have to log them on to every site one by one because they won't save passwords.